Frick R W
University of Washington.
Br J Psychol. 1988 Aug;79 ( Pt 3):289-308. doi: 10.1111/j.2044-8295.1988.tb02289.x.
This article is about a visual short-term store called the visuospatial sketchpad (VSSP), which is tested by immediate ordered recall. Several claims are made: first, even for categorizable stimuli such as digits and letters, the representation in VSSP is uncategorized and unparsed. Second, the representation in VSSP is parsed and categorized just prior to recall in a process called recovery. The probability of recovering an item depends upon the fidelity of that item's representation. Third, VSSP has a fixed amount of representational medium which is allocated proportionally to the items in the presentation. When too many items are presented for recall, not all of the items are represented with sufficient fidelity to be recovered, producing the phenomenon of limited capacity.
本文围绕一种名为视觉空间画板（VSSP）的视觉短期存储展开，该存储通过即时顺序回忆进行测试。文中提出了几点主张：其一，即便对于诸如数字和字母等可分类的刺激物，VSSP中的表征也是未分类且未解析的。其二，在一个称为恢复的过程中，VSSP中的表征恰好在回忆之前被解析和分类。恢复一个项目的概率取决于该项目表征的保真度。其三，VSSP具有固定数量的表征媒介，该媒介按比例分配给呈现中的项目。当呈现过多项目以供回忆时，并非所有项目都能以足够的保真度被表征从而得以恢复，由此产生了容量有限的现象。
